MSO 2010 Activation Problem

Recently, on a Windows 7 Enterprise system, I installed Microsoft Office 2010.
Trying to activate the product, using either Office Volume Activation Script for Z.W.T Keygen or EZ-Activator, the system responded with the following message:

“Windows cannot access the specified device, path, or file. You may not have the appropriate permissions to access the item.”

Repeating the same job on a Windows 7 Professional System, everything went OK.